I've taken a list of English words, and examined each of them to see what they sound like (using the PHP metaphone function). This page lists the most common metaphone codes, along with their words. You can also search for a word of your own, and see which words sound similar - and which ones rhyme, and which ones alliterate.
guru grue gaur guar kuru gurry guiro cur cru gor gar curr grey gree gory grew goer gore gray grow cure curia curie curio curry kauri kaury quare queer query quire